I first started with a MKIII in .22 and have one now fitted with a Tasco 1.75? x40, a classic combo circa 1979. They group fine out to 20m or so but I've never had one that could compare to the accuracy of a HW or Sport. Sorry, just don't think much of them. But for their original purpose of shooting with open sights around the farmyard they do the job fine; not that I do that anymore as I use more modern stuff.
At open sight ranges they are as good as anything.